The notice, which hilariously refers to a port-a-potty as a "masturbation facility," claims that there have been several cases of illness in the region due to exposure to bodily fluids. 

That sounded a little scientifically fishy to me, so I reached out to the Navy Corpsman who was my medic when I was deployed to Helmand province in 2011. He called malarkey. 

"Unless they're getting semen in an open wound, there's no way," said Petty Officer 2nd Class Eric Dodson, a Corpsman with 2nd Marine Division in Camp Lejeune, N.C. "There's no transdermal infection passable through semen, at least to my knowledge."